Crusher



March 7, 1933. J. BAKSTAD 1,899,930

CRUSHER Filed April 10, 1929 Patented Mar. 7,1933

UNITED STATES PATENT OFFICE JOHAN R. BAKSTAD, OF CHICAGO, ILLINOIS, ASSIGNOR. TO THE JEFFREY MANUFAC- TUBING COMPANY, on COLUMBUS, .onro, A CORPORATION OF OHIO GRUSI-IER Application filed April 10, 1929. Serial No. 354,021.

This invention relates to, improvements in crushers and particularly to improvements in a crusher of the type shown in my former Patent No. 1,578,948, issued March 30, 1926.

In my former construction I show a major movable jaw which cooperates in a crushing action with a main stationary jaw and also a pivoted auxiliary jaw which is connected by a link to the major movable jaw and co- 19 operates with crushing faces on both the movable and stationary jaws.

It is a purpose of this invention to provide in a crusher of the type in which there is a primary crusher in one path followed by an auxiliary crushing in two paths, of improved means for adjusting the size of the openings in accordance withthe varying sizes and ualities of the materials handled and the final size desired.

sists in the provision of means whereby the opening of both the primary and auxiliary jaws may be changed by one adjustment or the primary jaw opening alone maybe adjusted.

It is further a purpose of my invention to provide an improved and simplified construction of crusher of the type mentioned in which the spring tension uponthe operating parts may. be more readily adjusted and equalized so that during operation, the parts will be less susceptible to wear and vibration.

Thus a particular feature ofmy invention resides in improved spring tension means comprising an equalizer device which is connected both to the movable rocker and to the movable jaw whereby they are both held by' the same tension thus preventing free play between the parts.

40 Further objects and advantages of my invention will be more readily apparent from 1 the following descriptionvtaken in connection with the attached drawing inwhich V The single figure is-a vertical elevation par- "tially in-section of a crusher showing the improved construction. The crusher shown is generally similar to thatdescribed in my prior patent and its advantages have been there fully described thus the material is first subjected to primary Therefore, a-feature of my invention con-.

crushing which partially reducesthe size of the material, then the material is divided into two auxiliary crushing paths whereby the material is crushed to the final size. As the crusher is ordinarily used, the narrowest opening allowed between the primary jaws is twice as wide as the opening between the auxiliary jaws but since the width of the jaws in both cases is the same and there are two auxiliary crushing openings to one primary opening, the total area through which the material flows is the same in both cases. Thus there is no tendency for the material to clog as would be the case should all thematerial from a set of primary jaws be delivered to. a single set of auxiliary jaws of thesame width.

In my former construction I described means for simultaneously varying the narrowest openingsof the primary and auxiliary jaws and also showed eccentric supporting shafts whereby the movable auxiliary jaw could be adjusted in the mid position but I have found that it is difficult to properly control the jaw openings to obtain full capacity in accordance with the particular material being handled by simultaneously adjusting both the primary and auxiliary jaw openings. Therefore it is desirable that some means be provided whereby the primary jaw opening may be independently widened or narrowed relative to the auxiliaryjaw,

13 transmits its movement-to the movable jawlO through a toggle 15 which is loosely held in place in the toggle-seats 16 and 17 mainly the weight of the main crusher jaw, the normal tendency of which turns it:

to move it in a clock-wise direction. The

toggle seats 16 and 17 are held in place by the i I adjusting bolts 18 and 19. Different sizes of toggle plates 15 may be readily substituted and provide one form of means for simultaneously changing the upper and lower crushing openings.

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It is further apparent that the toggle plate acts as a safety means and will break before any serious damage is done to the rest of the machine should unorushable material pass between the jaws.

The rocker 13 is pivoted on shaft 20. I show spring equalizing means which assist the tendency of the weight of the movable jaw 10 and the rocker 13 to resist the movement imparted to them by the cam shaft 12, thus frame 21 has an opening 22 through which passes a spring rod 23 pivoted at 24 to an attachment bracket 25 from which extends a pivoted link 26 and a pivoted rod 27. The rod 27 extends through an opening in the frame of the rocker 13 and is provided on its end with a block 28 which may be adjusted by nuts 29 to cooperate with one of a plurality of lugs 30 formed on the frame of the rocker 13. The link 26 is pivoted to a bracket 31 which extends from the lower end of the movable jaw 10. The spring rod 23 is held by spring 32 spaced between caps 33 and 34. The cap 33 may be held in place by the adjusting nuts 35 while the cap 34 is pivotally held in a bearing seat 36. By adjusting the tension of the spring 32 and varying the connection of the rod 27 to the rocker 13, the tension on the movable j aw 10 and the movable rocker 13 may be equalized and cause the parts to move in correct relation.

To the face of the jaw 10 is attached a crusher plate 37 held by block 38 which is secured by the nuts 39. The plate 37 forms a primary crushing plate and cooperates with a crusher plate 40 which is attached to a stationary jaw 41 in a similar manner by a block 42, but instead of being fixedly mounted, as

in my prior construction, the jaw 41 is pivotally supported by shaft 43, and, during normal operation, is held by spacing toggle 44 which extends from the frame to the lower end of the crusher jaw 41. The toggle plate -44 is held against displacement by means of a rod 45 which is pivotally attached to the jaw41 at 46 and extends through an opening in the frame and is tightened by means of the nuts 47. Thus it is apparent that by changingthe size of the toggle plate 44, the opening between the lower ends of the crusher plates 3740 may be independently varied.

Beneath the primary crushing jaws 10 and 41 is pivoted a third movable auxiliary jaw 48 which is supported by shaft 49 and is given movement through a link 50 pivotally connected to the movable jaw 10 through a shaft 51'and is also pivotally connected to the auxl ary jaw 48 through a shaft 52. The auxiliary jaw 48 carries crushing plates 53 and 5 4. Crusher plate 54 cooperates with a stationary crusher plate 55 which is fixedly secured to the frame while the crusher plate 53 cooperates with the crusher plates 56 which is attached to the lower part of the crusher jaw 10. A V-shaped spreader plate 57 is slidably mounted above the upper end of the movable jaw 48 and divides the material which passes through the primary jaws into two portions directed towards the auxiliary jaws. The spreader plate 57 is preferably adjustably held in a slot 58 whereby when the opening between the primary jaws is varied, the plate 57 may be moved so as to correctly divide the material.

In the ordinary use of my crusher, the final size may be adjusted by merely changing the toggle plate 15 whereby the openings of both the primary and auxiliary jaws are simultaneously changed, but, as previously stated, it may be desirable, in some instances, in order to allow proper flow of material through the crusher and permit its operation to full capacity that the opening of the primary jaws be independently adjusted. In such case the opening between the primary crusher plates may be narrowed or widened by changing the toggle plate 44 and thus moving normally stationary j aw 41 about its fixed pivot. It isfurther to be noted that the mounting of the normally stationary jaw is such that it may be readily removed in order to permit access to the interior of the crusher.

Many modifications and changes may be made in the particular embodiment of my invention without departing from the spirit of my invention as expressed in the appended claims. 1

I claim:

1. In a crusher, primary crushing means comprising relatively movable jaws, auxiliary crushing means comprising a double set of relatively movable aws, means for operat ing all three sets of jaws from a common power shaft, means for directing the material discharging from said primary crushing jaws to said auxiliary crushing jaws, the total area of discharge from the auxiliary crushing jaws being substantially equal to the area of discharge from said primary crushing jaws, means for simultaneously adjusting said primary discharge area and said auxiliary discharge area and independent means for adjusting said primary discharge area.

2. In a crusher, primary crushing means comprising relatively movable jaws, auxiliary crushing means comprising a double set of relatively movable jaws, means for operating all three sets of jaws from a common power shaft, means for directing the material discharged from said primary crushing aws to said auxiliary crushing aws, the total area of discharge from the auxiliary crushing jaws being substantially equal to the area of discharge from said primary crushing jaws. means for simultaneously adjusting said primary discharge area and said auxiliary discharge area and independent means for adj usting said primary discharge area, said last named means comprising a normally stationary primary jaw supported by a fiXed pivot and means for adjusting said jaw by swinging movement about said pivot.

3. In a crusher, primary crushing means comprising relatively movable jaws, auxiliary crushing means comprising a double set of relatively movable jaws, means for operating all three sets of jaws from a common power shaft, means for directing the material discharging from said primary crushing jaws to said auxiliary crushing jaws, the total area of discharge from the auxiliary crushing jaws being substantially equal to the area of discharge from said primary crushing jaws, means for simultaneously adjusting said primary discharge area and said auxiliary discharge area and independent means for adjusting said'primary discharge area, said last-named means comprising a normally stationary jaw supported from a fixed pivot, a spacing toggle for determining the position of said stationary jaw about its fixed pivot and means holding said jaw against said toggle to retain said toggle in place.

4:. In a crusher, the combination with a movable jaw, of means for imparting a crushing stroke to said aw, said means comprising an actuating arm, resilient means arranged to transmit a component of forceto said jaw and to said actuating arm tending to effect return strokes thereof, means for varying the resilient force upon both said jaw and said actuating arm simultaneously and independent means for adjusting the resilient force upon said actuating arm.

5. In a crusher, the combination with a swinging jaw member, of means for imparting a crushing stroke to said jaw member comprising, a rocker member and a toggle between the latter and said swinging j aw member and means comprising a resilient spring connected to said swinging jaw member and said rocker to transmit its tension force to both said rocker and said jaw member tending to effect return strokes thereof and keep said toggle under compression between said rocker and said jaw member.

6. In a crusher, the combination with a swinging jaw member, of means for imparting a crushing stroke to said jaw member comprising, a rocker member and means for effecting return strokes of said swinging jaw and said rocker member comprising resilient means, a distributing member pivotally connected to said resilient means and pivotal connections from said distributing member to said swinging jaw and said rocker member whereby the force of said resilient means is transmitted and distributed to both said swinging jaw and said rocker member.

7. In a crusher, the combination with primary crushing means comprising relatively movable jaws, of auxiliary crushing means comprising two paii's of relatively movable v aws, means for operating said aws by offecting relative movements thereof, means for simultaneously ad usting the primary vmary crushing means comprising relatively novable aws, ofvmeans for ad usting therelative positions of said jaws, auxiliary crushing means comprising two, sp aced-apart pairs of relatively movable aws,means for directing the material discharged from the primary crushing JZLWS- to said, auxiliary crushing aws, and mechanism affording lateral. adjustment of said directingmeans in accordance with the relative ad nstmentof the primary crushing jaws.

- 9. In a crusher, a frame, a swingingicrusher aw, means for imparting a crush ng stroke to said aw comprising an operating member, an intermediate actuating member in thrustsaid crusher jaw, a tension transmitting member connected to both said actuating member and said crusher jaw and resilient means reacting between said frame and said tension transmitting member tending to prevent relative separation between said operating member and said actuating member and between said actuating member and said crusher jaw.

10. In a crusher, a frame, a swinging ing stroke to said aw comprising an operating member, an intermediate rocker member in thrust-receiving relation with said operating member and in thrust-transmitting relation with said crusher jaw, a tension trans-- mitting member connected to both said rocker jaw and independent means for adjusting the tension transmitted to said rocker member.

11. In a crusher, a frame, a swinging crusher jaw pivotally supported by said" frame, means for imparting a crushing stroke to said jaw comprising a-rotatable cam, an intermediate rocker member pivotally supported by said frame in thrust-receiving re lation with said cam and in thrust-transmit ting relation with said crusher jaw, a tension transmitting member pivotally connected to both said rocker member and said crusher jaw and resilient means reacting between said frame and said tension transmitting discharge area and the auxiliary discharge receiving relation with saido1i erating nember and in thrust-transmitting relation with crusher jaw, means for imparting a crush-311,

- to both said rocker member and said crusher member tending to prevent relative separation between said cam and said rocker member and between said rocker member and said crusher jaw. I

12. In a' crusher, a frame, a swinging crusher jaw pivotally supported by said frame, means for imparting a crushing stroke to said jaw comprising a rotatable cam, an intermediate rocker member pivotally supported by said frame in thrust-receiving relation with said cam and in thrust-transmitting relation with said crusher jaw, said rocker member and said crusher jaw being so supported that the weight thereof will normally produce the return stroke, means for assisting the return stroke of said rocker member and said crusher j aw andpreventing relative separation therebetween, said means comprising a resilient spring transmitting a component of force to both the said rocker member and crusher jaw, means for simultaneously varying the resilient force upon both said rocker member and said crusher jaw and independent means for varying the resilient force upon said rocker member.

Signed at Chicago, Illinois, this 8th. day of April, 1929.

JOHAN R. BAKSTAD. 

